Microanatomy of the reproductive tract of the drake (Anas boscas).
D000818:Animals; D004372:Ducks / Q000033:anatomy & histology*; D004822:Epididymis / Q000033:anatomy & histology*; D008297:Male; D010413:Penis / Q000033:anatomy & histology*; D013737:Testis / Q000033:anatomy & histology*